I installed VirtualBox 5.0.12 and Genymotion on my PC with Ubuntu 14.0.4. Virtual box ran once, then i created virtual machine and closed VB and when i decided to run VB once more - i got such message:"Failed to create COM-object VirtualBoxClient. The application will now terminate" and CalleRC: NS_ERROR_FACTORY_NOT_REGISTERED (0x80040154).
Then i started looking for solution and it seemed that i had found it: I should delete /tmp/.vbox-$USER-ipc/ . But i could not find it in folder tmp.
Also this article
http://man-linux.ru/notes/virtualbox-issue-solv/ is seemed to be useful but it does not work on my PC as well.
Maybe someone know how to solve this problem?